After having some problems with the temperature sensors, the PSU test at tomshardware.com is again underway. At the moment they are testing a second sample of the OCZ Powerstream 600W to see how this one holds. The editors mention that they might test second samples of the other PSUs that failed the test.

BTW, I just saw that, contrary to what I posted realier, both Antec PSUs didn't pass but failed the test, due to fluctuations on the +12V line. It's remarkable that both PSUs had the same problem. No way to go, Antec.